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Nezavi [6.7K]
3 years ago
7

Tell whether the ratios form a proportion. 1/3, 7/21

Mathematics
2 answers:
Mandarinka [93]3 years ago
7 0

Answer:

i would say yes

my work :

so i did 21 times 1 which is 21.

Tben i did 3 times 7 which is also 21.

So in conclusion i would say yes but i can't guarantee that

Anuta_ua [19.1K]3 years ago
6 0

Answer:

Yes

Step-by-step explanation:

7/21 -> Divide both sides by 7 which gets you 1/3

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What is the standard form of the equation y=3/4x-6
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Answer :

y=3/4x-6

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6 0
3 years ago
g natasha is in a class of 30 students that selects 4 leaders. How many ways are there to select the 4 leaders so that natasha i
Papessa [141]

Answer:

<h2>3,654 different ways.</h2>

Step-by-step explanation:

If there are 30 students in a class with natasha in the class and natasha is to select four leaders in the class of which she is already part of the selection, this means there are 3 more leaders needed to be selected among the remaining 29 students (natasha being an exception).

Using the combination formula since we are selecting and combination has to do with selection, If r object are to selected from n pool of objects, this can be done in nCr number of ways.

nCr = n!/(n-r)!r!

Sinca natasha is to select 3 more leaders from the remaining 29students, this can be done in 29C3 number of ways.

29C3 = 29!/(29-3)!3!

29C3 = 29!/(26!)!3!

29C3 = 29*28*27*26!/26!3*2

29C3 = 29*28*27/6

29C3 = 3,654 different ways.

This means that there are 3,654 different ways to select the 4 leaders so that natasha is one of the leaders

5 0
3 years ago
A population of caribou in a forest grows at a rate of 2% every year. If there are currently 273 caribou, which function represe
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Answer:

Step-by-step explanation:

D

C (t)= 273 (0.02)t

6 0
3 years ago
Find A-2B. quickly !!!​
alexgriva [62]

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Step-by-step explanation:

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3 years ago
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